I used the stock lug nuts, I'm not ure if you're supposed to or not, I can't imagine why not.
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2007 Mysterious N/A Solstice. Mods: GMPP intake, sport pedals, 18' staggered Gravana J2, shorty antenna, Eibach ProKit, Cat-back exhaust (Magnaflow)
Near term future mods: , high-flow cat, Vector chip, THEN RACING!!!